A laser marking device for optical lens processing

Abstract

The application relates to the technical field of laser marking devices, and particularly discloses a laser marking device for optical lens processing, which comprises a marking device main body, a laser and a conveying belt, clamps, a curved surface detection mechanism and a laser adjusting mechanism. The clamps are arranged on the conveying belt, the curved surface detection mechanism is arranged on the surface of the clamps, and the laser adjusting mechanism is arranged in the laser. The laser marking device for optical lens processing can detect the lens in situ through the arranged curved surface detection mechanism, does not need to input the curved surface data of the lens in advance, and can complete the curved surface detection and the laser marking at the same station. After detection, marking is immediately performed, the posture deviation problem caused by station separation is avoided, the curved surface data can truly reflect the lens state during marking, the laser incidence angle and the focal length can be corrected in real time according to the curved surface change through the laser adjusting mechanism, separate adjustment for different models of lenses is not needed, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of laser marking equipment technology, specifically a laser marking device for optical lens processing. Background Technology

[0002] Optical lenses are transparent optical components that are processed with high precision and can accurately control light. They are precision parts specifically used to refract, focus, image, and correct light. During the processing of optical lenses, laser marking devices use high-energy laser beams to form permanent marks on the surface or edge of the lens for marking parameters, anti-counterfeiting, traceability, or decoration, without damaging the optical performance of the lens.

[0003] When using a laser marking device, the laser generates a high-energy laser beam of a specific wavelength through stimulated emission. The diameter of the laser beam is adjusted by a beam expander to improve beam quality and focusing accuracy. Then, it enters the galvanometer scanning system. The computer controls the high-speed deflection of the XY-axis galvanometers and controls the scanning path of the laser beam in real time. The focusing lens focuses the laser beam into a spot, forming an extremely high energy density on the lens surface. The laser spot acts on the lens surface, producing different reactions depending on the laser type and material properties. The computer controls the galvanometer scanning according to a preset pattern, and the laser beam writes point by point and line by line, ultimately forming the mark.

[0004] However, most optical lenses are spherical or aspherical curved surfaces, while laser marking heads are planar focal planes. To avoid inconsistent marking depth and blurry text due to different defocus points at the high and low points of the curved surface, some existing laser marking devices pre-input the curvature or 3D contour of the lens surface. During marking, the system adjusts the focal length in real time according to the scanning position, ensuring the laser spot always falls on the curved surface of the lens without defocusing. However, this method requires pre-entering the curved contour of the lens, which has poor adaptability to irregular curved surfaces. Furthermore, the entry position of the lens surface and the laser marking position are not the same; the lens needs to move a certain distance to reach the marking station. During this delay from the entry point to the marking point, if the lens posture changes, the recorded surface data no longer represents the actual state during laser marking, affecting the marking effect. Therefore, we propose a laser marking device for optical lens processing. Summary of the Invention

[0005] The purpose of this invention is to provide a laser marking device for optical lens processing, in order to solve the problems mentioned in the background art, such as the poor adaptation of irregular curved surfaces when the curved surface contour of the lens is pre-entered, and the fact that the curved surface entry position of the lens and the laser marking position are not the same. The lens needs to move a certain distance to reach the marking station. During the delay process when the lens moves from the entry point to the marking point, if the lens posture changes, the curved surface data at the time of entry can no longer represent the actual state at the time of laser marking, thus affecting the marking effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser marking device for optical lens processing, comprising a marking device body; further comprising a laser and a conveyor belt, wherein the laser and the conveyor belt are located inside the marking device body, and the laser is located at the top of the conveyor belt; and a clamp, wherein multiple clamps are provided, and the clamps are located on the surface of the conveyor belt.

[0007] The curved surface inspection mechanism is located on the surface of the fixture. When the fixture moves to a position directly below the laser, the curved surface inspection mechanism detects the curvature of the lens marking area inside the fixture.

[0008] The laser adjustment mechanism is located inside the laser. After the curved surface detection mechanism detects the curvature of the lens, the laser adjustment mechanism adjusts the laser incident angle of the laser based on the detection results.

[0009] The curved surface inspection mechanism includes a fixed cover, a placement groove on the surface of the fixture, the fixed cover abutting against the inner wall of the placement groove, a receiving groove on the inner wall of the fixed cover, a detection plate slidably connected to the inner wall of the receiving groove, a detection component inside the detection plate, and a transmission component on the surface of the fixture for driving the detection component to work.

[0010] The transmission component includes a piston plate fixedly connected to the detection plate, the piston plate being slidably and sealingly connected to the inner wall of the receiving groove, a return spring fixedly connected to the outer side of the piston plate, the return spring being fixed to the inner wall of the receiving groove, an air supply hole being opened on the inner wall of the fixture, the air supply hole being connected to the receiving groove, a pneumatic telescopic rod being installed on the inner wall of the marking device body, a movable frame being fixedly connected to the telescopic end of the pneumatic telescopic rod, an air supply pipe being fixedly connected to the inner wall of the movable frame, the air supply pipe being connected to the air source inside the marking device body, and a docking part being provided at the end of the air supply pipe near the fixture.

[0011] The docking component includes a docking frame, which is fixedly connected to a movable frame and connected to an air supply pipe. A docking plate is fixedly connected to the surface of the clamp and connected to an air supply hole. Multiple docking holes are opened on the surface of the docking plate. Multiple docking posts are provided on one end of the docking frame near the docking plate. A target plate is fixedly connected to the surface of the docking plate, and a laser rangefinder is installed on the surface of the docking frame.

[0012] The detection component includes an air cavity formed on the inner wall of the detection plate, a connecting hole formed on the inner wall of the detection plate, and two ends of the connecting hole connected to the air cavity and the receiving groove respectively. A sealing element is provided on the inner wall of the connecting hole. After the detection plate slides a fixed distance along the inner wall of the receiving groove, the sealing element releases the seal on the connecting hole. Multiple detection holes are formed on the lower surface of the detection plate, and multiple feedback holes are formed on the upper surface of the detection plate. The multiple detection holes and multiple feedback holes are connected in the vertical direction. A measuring element for measuring the distance between the detection hole and the lens is provided on the inner wall of the feedback hole.

[0013] The measuring component includes a detection rod that is slidably connected to the inner wall of the feedback hole, and multiple infrared rangefinders are provided on the inner wall of the air chamber, with each infrared rangefinder corresponding to one of the multiple detection rods.

[0014] The detection rod has an iron ring fixedly connected to one end of the feedback hole. Multiple electromagnets are installed on the top of the detection plate. The multiple electromagnets are located outside the feedback hole, and each electromagnet corresponds to an iron ring. A controller is installed on the surface of the main body of the marking device. The controller controls the power supply to the multiple electromagnets.

[0015] The sealing element includes a sealing plug that is slidably connected to the inner wall of the connecting hole, and a compression spring is fixedly connected to the outside of the sealing plug. The compression spring is fixedly connected to the inner wall of the connecting hole.

[0016] The laser adjustment mechanism includes an electric telescopic rod fixedly connected to the end of the laser. A control box is fixedly connected to the output end of the electric telescopic rod. A reflector 1 and a reflector 2 are installed on the inner wall of the control box. A servo motor 1 is fixedly connected to the outer side of reflector 1, and a servo motor 2 is fixedly connected to the outer side of reflector 2. Both servo motor 1 and servo motor 2 are installed on the inner wall of the control box. The output shafts of servo motor 1 and servo motor 2 are perpendicular to each other. A control card is installed on the surface of the laser. The control card is connected to the infrared rangefinder, the electric telescopic rod, servo motor 1, and servo motor 2, respectively.

[0017] The sealing end of the sealing plug is tapered.

[0018] This invention has at least the following beneficial effects:

[0019] When in use, this application uses a curved surface inspection mechanism to perform in-situ multi-point inspection of the lens, adapting to various optical lenses such as spherical, aspherical, and irregular curved surfaces. There is no need to pre-enter the lens surface data. The curved surface inspection and laser marking are completed at the same station. Marking is performed immediately after inspection, with no delay due to lens movement. This avoids posture deviation problems caused by station separation and ensures that the curved surface data can accurately reflect the lens state at the time of marking. Furthermore, the laser adjustment mechanism allows the laser incident angle and focal length to be corrected in real time according to changes in the curved surface, eliminating the need for separate adjustments for different lens models and improving production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0022] Figure 3 This is a schematic front cross-sectional view of the laser adjustment mechanism of the present invention;

[0023] Figure 4 This is a schematic diagram of the curved surface detection mechanism of the present invention;

[0024] Figure 5 for Figure 4 Enlarged diagram of area A in the middle;

[0025] Figure 6 This is a top sectional view of the fixed cover structure of the present invention;

[0026] Figure 7 This is a side sectional view of the detection plate structure of the present invention;

[0027] Figure 8 for Figure 7 Enlarged diagram of area B in the middle;

[0028] Figure 9 This is a top-view cross-sectional structural diagram of the sealing component of the present invention.

[0029] In the diagram: 1. Marking device body; 2. Laser; 3. Conveyor belt; 4. Fixture; 5. Curved surface inspection mechanism; 50. Fixed cover; 51. Placement slot; 52. Receiving slot; 53. Inspection plate; 54. Inspection piece; 55. Transmission component; 56. Piston plate; 57. Return spring; 58. Air inlet; 59. Pneumatic telescopic rod; 510. Moving frame; 511. Air pipe; 512. Connecting piece; 513. Connecting frame; 514. Connecting plate; 515. Connecting hole; 516. Connecting post; 517. Target plate; 518. 519. Laser rangefinder; 520. Air cavity; 521. Connecting hole; 522. Seal; 523. Detection hole; 524. Feedback hole; 525. Measuring component; 526. Detection rod; 527. Infrared rangefinder; 528. Iron ring; 529. Electromagnet; 530. Controller; 531. Sealing plug; 532. Compression spring; 6. Laser adjustment mechanism; 60. Electric telescopic rod; 61. Control box; 62. Reflector one; 63. Reflector two; 64. Servo motor one; 65. Servo motor two; 66. Control card. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 9This invention provides a technical solution: a laser marking device for optical lens processing, comprising a marking device body 1; a laser 2 and a conveyor belt 3, the laser 2 and the conveyor belt 3 being located inside the marking device body 1, with the laser 2 located on top of the conveyor belt 3; a clamp 4, of which multiple clamps are provided, the clamps 4 being located on the surface of the conveyor belt 3; a curved surface detection mechanism 5, located on the surface of the clamps 4, which detects the curvature of the lens marking area within the clamps 4 when the clamps 4 move directly below the laser 2; and a laser adjustment mechanism 6, located inside the laser 2, which adjusts the laser incident angle of the laser 2 according to the detection result after the curved surface detection mechanism 5 detects the curvature of the lens.

[0032] In use, the operator places the optical lens to be marked (spherical, aspherical, or irregular curved surface) into the fixture 4 to achieve initial positioning; then fastens the fixing cover 50 and moves the curved surface detection mechanism 5 above the optical lens;

[0033] The main body 1 of the marking device starts the conveyor belt 3, which transports the fixture 4 to the marking station. When the fixture 4 moves directly below the laser 2, the conveyor belt 3 stops working.

[0034] At this time, the curved surface inspection mechanism 5 unfolds, the operator selects the marking area of ​​the optical lens, and then the curved surface inspection mechanism 5 automatically detects the curved surface shape of the marking area of ​​the optical lens. Based on the detected lens curved surface data, the laser adjustment mechanism 6 makes the laser incident angle and focal length correct in real time according to the changes in the curved surface.

[0035] After adjustment, laser 2 is started, and laser adjustment mechanism 6 controls laser deflection and plans laser scanning path according to preset marking pattern and real-time curved surface data;

[0036] After marking is completed, laser 2 is turned off, conveyor belt 3 is restarted, the marked lens is sent to the unloading station, and the next unmarked lens is moved to the marking station. The operator opens the fixed cover 50, takes out the lens, and completes the entire processing flow.

[0037] The curved surface inspection mechanism 5 includes a fixed cover 50, a placement groove 51 is provided on the surface of the fixture 4, the fixed cover 50 abuts against the inner wall of the placement groove 51, a receiving groove 52 is provided on the inner wall of the fixed cover 50, a detection plate 53 is slidably connected to the inner wall of the receiving groove 52, a detection element 54 is provided inside the detection plate 53, and a transmission element 55 is provided on the surface of the fixture 4 to drive the detection element 54 to work.

[0038] When the conveyor belt 3 moves the fixture 4 directly below the laser 2, the transmission component 55 pushes the detection plate 53 to slide along the inner wall of the receiving groove 52, so that the detection plate 53 unfolds from the receiving groove 52. When the detection plate 53 is fully unfolded, the transmission component 55 drives the detection component 54 in the detection plate 53 to work. The detection component 54 performs in-situ multi-point detection on the optical lens in the fixture 4 to match the surface data of the area to be marked on the detection lens.

[0039] The transmission component 55 includes a piston plate 56 fixedly connected to the detection plate 53. The piston plate 56 is slidably and sealed to the inner wall of the receiving groove 52. A return spring 57 is fixedly connected to the outer side of the piston plate 56 to cooperate in resetting the unfolded detection plate 53. The return spring 57 is fixed to the inner wall of the receiving groove 52. An air supply hole 58 is opened on the inner wall of the clamp 4. The air supply hole 58 is connected to the receiving groove 52. A pneumatic telescopic rod 59 is installed on the inner wall of the marking device body 1. A movable frame 510 is fixedly connected to the telescopic end of the pneumatic telescopic rod 59. An air supply pipe 511 is fixedly connected to the inner wall of the movable frame 510. The air supply pipe 511 is connected to the air source inside the marking device body 1. In use, air is supplied to the air supply pipe 511 through the air source inside the marking device body 1. A docking part 512 is provided at the end of the air supply pipe 511 near the clamp 4.

[0040] When the clamp 4 moves directly below the laser 2, the pneumatic telescopic rod 59 operates, driving the moving frame 510 to move. The moving frame 510 drives the docking part 512 to approach the clamp 4. Through the docking part 512, the gas in the gas supply pipe 511 enters the gas supply hole 58, causing the gas pressure in the receiving groove 52 to gradually increase. When the connection is first established, as the gas pressure in the receiving groove 52 increases, the gas in the receiving groove 52 pushes the detection plate 53 to move through the piston plate 56. When the detection plate 53 is fully extended, the gas in the receiving groove 52 can no longer push the piston plate 56 to continue moving, causing the gas pressure in the receiving groove 52 to continue to increase.

[0041] The docking component 512 includes a docking frame 513, which is fixedly connected to the moving frame 510 and connected to the air supply pipe 511. A docking plate 514 is fixedly connected to the surface of the clamp 4 and is connected to the air supply hole 58. Multiple docking holes 515 are opened on the surface of the docking plate 514. Multiple docking posts 516 are provided on one end of the docking frame 513 near the docking plate 514. A target plate 517 is fixedly connected to the surface of the docking plate 514. A laser rangefinder 518 is installed on the surface of the docking frame 513 and is connected to the pneumatic telescopic rod 59. The laser rangefinder 518 is used to detect the position of the target plate 517. When the target plate 517 moves into the detection range of the laser rangefinder 518, the pneumatic telescopic rod 59 is triggered to work.

[0042] When the conveyor belt 3 moves the clamp 4, the clamp 4 moves the docking plate 514, and the target plate 517 of the docking plate 514 moves. When the target plate 517 moves to the outside of the laser rangefinder 518, the laser rangefinder 518 detects that the clamp 4 has moved to the marking station. At this time, the laser rangefinder 518 controls the pneumatic telescopic rod 59 to extend. The pneumatic telescopic rod 59 moves the moving frame 510. The moving frame 510 moves the docking frame 513 closer to the docking plate 514, so that the docking post 516 of the docking frame 513 is inserted into the docking hole 515, so that the air supply pipe 511 is connected to the air supply hole 58 to cooperate in filling the receiving groove 52 with air.

[0043] The detection component 54 includes an air cavity 519 formed in the inner wall of the detection plate 53. A connecting hole 520 is formed in the inner wall of the detection plate 53. The two ends of the connecting hole 520 are connected to the air cavity 519 and the receiving groove 52, respectively. A sealing element 521 is provided in the inner wall of the connecting hole 520. After the detection plate 53 slides along the inner wall of the receiving groove 52 for a fixed distance, the sealing element 521 releases the seal on the connecting hole 520. A plurality of detection holes 522 are formed on the lower surface of the detection plate 53. A plurality of feedback holes 523 are formed on the upper surface of the detection plate 53. The plurality of detection holes 522 and the plurality of feedback holes 523 are connected in the vertical direction. A measuring element 524 for measuring the distance between the detection hole 522 and the lens is provided in the inner wall of the feedback hole 523.

[0044] When the gas supply pipe 511 just starts to fill the receiving tank 52 with gas, the gas in the receiving tank 52 pushes the piston plate 56 to slide along the inner wall of the receiving tank 52, and the piston plate 56 drives the detection plate 53 to move.

[0045] When the detection plate 53 is fully deployed, as the gas supply pipe 511 continues to fill with gas, the gas pressure in the receiving groove 52 continuously increases. When the gas pressure in the receiving groove 52 reaches the threshold, the seal 521 releases the seal on the connecting hole 520. At this time, the gas in the receiving groove 52 enters the gas chamber 519 through the connecting hole 520. The gas chamber 519 injects gas into multiple chambers composed of detection holes 522 and feedback holes 523. After the gas enters the gas chamber 519, because the feedback hole 523 is equipped with a measuring element 524, the gas will be ejected from the detection hole 522. The air column ejected from 522 impacts the lens surface. After the airflow bounces off, it creates a reverse pressure at the aperture. This pressure is transmitted back into the detection aperture 522, causing the back pressure to rise. The back pressure varies depending on the distance between the lens and the detection aperture 522. The back pressure is detected by the measuring element 524. The greater the back pressure, the closer the vertical distance between the lens surface and the detection aperture 522. Thus, multiple measuring elements 524 can perform multi-point detection on the lens, adapting to various optical lenses such as spherical, aspherical, and irregular curved surfaces, without the need to pre-enter the lens surface data.

[0046] The measuring component 524 includes a detection rod 525 slidably connected to the inner wall of the feedback hole 523. Multiple infrared rangefinders 526 are provided on the inner wall of the air chamber 519, with each infrared rangefinder 526 corresponding to one of the detection rods 525. An iron ring 527 is fixedly connected to one end of the detection rod 525 extending out of the feedback hole 523. Multiple electromagnets 528 are mounted on the top of the detection plate 53, located outside the feedback hole 523, with each electromagnet corresponding to one of the iron rings 527. A controller 529 is mounted on the surface of the marking device body 1. Each electromagnet 528 is numbered, and the controller 529 controls the energization of the multiple electromagnets 528 according to their numbers.

[0047] When the detection plate 53 is fully unfolded, the detection plate 53 overlaps with the marking area of ​​the optical lens in the vertical direction. Since the marking area of ​​the optical lens is generally on the side of the lens, the operator controls the electromagnet 528 in the corresponding area of ​​the detection plate 53 to de-energize through the controller 529, so that the area composed of multiple de-energized electromagnets 528 completely covers the marking area.

[0048] As gas is injected into the chamber composed of detection hole 522 and feedback hole 523 from the gas chamber 519, the de-energized electromagnet 528 no longer attracts the iron ring 527 at the top of the detection rod 525. As the back pressure increases, the detection rod 525 moves a greater distance along the feedback hole 523. The movement distance of the detection rod 525 is measured by the infrared rangefinder 526. The movement amplitude of multiple detection rods 525 is used to match the degree of undulation of the surface of the lens marking area.

[0049] The sealing element 521 includes a sealing plug 530 that is slidably connected to the inner wall of the connecting hole 520. A compression spring 531 is fixedly connected to the outer side of the sealing plug 530. The compression spring 531 is fixedly connected to the inner wall of the connecting hole 520. The sealing end of the sealing plug 530 is tapered.

[0050] As the gas pressure in the receiving groove 52 gradually increases, the pressure of the gas on the sealing plug 530 also increases. When the pressure of the gas on the sealing plug 530 in the receiving groove 52 is greater than the elastic force of the compression spring 531 on the sealing plug 530, the sealing plug 530 slides along the inner wall of the connecting hole 520, so that the sealing plug 530 releases the seal on the connecting hole 520. When the gas filling in the receiving groove 52 stops, the compression spring 531 pushes the sealing plug 530 to reset, so as to close the connecting hole 520 again.

[0051] The laser adjustment mechanism 6 includes an electric telescopic rod 60 fixedly connected to the end of the laser 2. A control box 61 is fixedly connected to the output end of the electric telescopic rod 60. A reflector 62 and a reflector 63 are installed on the inner wall of the control box 61. A servo motor 64 is fixedly connected to the outer side of the reflector 62. A servo motor 65 is fixedly connected to the outer side of the reflector 63. Both the servo motor 64 and the servo motor 65 are installed on the inner wall of the control box 61. The output shafts of the servo motor 64 and the servo motor 65 are perpendicular to each other. A control card 66 is installed on the surface of the laser 2. The control card 66 is connected to the infrared rangefinder 526, the electric telescopic rod 60, the servo motor 64, and the servo motor 65.

[0052] The control card 66 is a commonly used embedded motion control card in the laser processing field. It is fixedly installed on the outer wall of the laser 2 and integrates a microprocessor (MCU / FPGA), a signal acquisition unit, a data processing unit, and a drive output interface. The control card 66 is connected to the infrared rangefinder 526, the electric telescopic rod 60, the servo motor 1 64, and the servo motor 2 65 via data cables to realize real-time data transmission and command issuance. The control card 66 has a built-in surface fitting algorithm, which can quickly fit the equation of the curvature of the lens marking area based on the distance data of multiple infrared rangefinders 526, and then calculate the adjustment parameters of the laser incident angle and focal length.

[0053] In use, the infrared rangefinder 526 uploads the multi-point height information of the marking area of ​​the optical lens to the control card 66. After receiving the multi-point height signals of the lens collected by multiple infrared rangefinders 526 in real time, the control card runs the internal preset surface fitting algorithm to fit the scattered height points into the real-time surface curvature equation of the marking area of ​​the lens. Based on the surface equation, the defocus amount of each marking point and the corresponding laser incident angle are automatically calculated.

[0054] The control card 66 controls the electric telescopic rod 60 to work according to the defocus amount. The electric telescopic rod 60 drives the adjustment box 61 to move in order to adjust the focal length. After the control card 66 sends a signal to the servo motor 1 64 and the servo motor 2 65, the servo motor 1 64 and the servo motor 2 65 adjust the angle of the reflector 1 62 and the reflector 2 63 so that the laser always hits the curved lens perpendicularly and plans the laser scanning path.

[0055] In this application, the basic algorithm principles such as surface fitting algorithm, defocus calculation, and laser incident angle have been widely used in the field of 3D laser marking.

[0056] Surface fitting algorithms: Least squares, polynomial fitting, NURBS and other surface fitting methods have been maturely applied in the fields of optical inspection and 3D modeling. They can fit the surface equation through multi-point height data and calculate parameters such as curvature and normal direction.

[0057] Defocus calculation: 3D laser marking machines generally use a height detection system (laser range sensor / vision camera) to obtain workpiece height data, and combine it with the focal length relationship to calculate the defocus amount, so as to achieve dynamic focusing. This is one of the core principles of 3D dynamic focusing technology.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser marking device for optical lens processing, comprising: The main body of the marking device; Its features include: a laser and a conveyor belt, wherein the laser and the conveyor belt are located inside the main body of the marking device, and the laser is located at the top of the conveyor belt; A clamp, wherein multiple clamps are provided and the clamps are located on the surface of the conveyor belt; A curved surface inspection mechanism is located on the surface of a fixture. When the fixture moves to a position directly below the laser, the curved surface inspection mechanism detects the curvature of the lens marking area within the fixture. A laser adjustment mechanism is located inside the laser. After the curved surface detection mechanism detects the curvature of the lens, the laser adjustment mechanism adjusts the laser incident angle of the laser according to the detection result. The curved surface detection mechanism includes a fixed cover, a placement groove is provided on the surface of the fixture, the fixed cover abuts against the inner wall of the placement groove, a receiving groove is provided on the inner wall of the fixed cover, a detection plate is slidably connected to the inner wall of the receiving groove, a detection component is provided inside the detection plate, and a transmission component for driving the detection component to work is provided on the surface of the fixture. The detection element includes an air cavity formed in the inner wall of the detection plate. A connecting hole is formed in the inner wall of the detection plate, and the two ends of the connecting hole are respectively connected to the air cavity and the receiving groove. A sealing element is provided in the inner wall of the connecting hole. After the detection plate slides a fixed distance along the inner wall of the receiving groove, the sealing element releases the seal on the connecting hole. Multiple detection holes are formed on the lower surface of the detection plate, and multiple feedback holes are formed on the upper surface of the detection plate. The multiple detection holes and multiple feedback holes are connected in the vertical direction. A measuring element for measuring the distance between the detection hole and the lens is provided in the inner wall of the feedback hole. The measuring element includes a detection rod that is slidably connected to the inner wall of the feedback hole. The inner wall of the air cavity is provided with multiple infrared rangefinders, and the multiple infrared rangefinders correspond one-to-one with the multiple detection rods. An iron ring is fixedly connected to one end of the detection rod that protrudes from the feedback hole. Multiple electromagnets are installed on the top of the detection plate. The multiple electromagnets are located outside the feedback hole, and each electromagnet corresponds to an iron ring. A controller is installed on the surface of the main body of the marking device. The controller controls the multiple electromagnets to turn on and off.

2. The laser marking device for optical lens processing according to claim 1, characterized in that: The transmission component includes a piston plate fixedly connected to the detection plate. The piston plate is slidably and sealingly connected to the inner wall of the receiving groove. A return spring is fixedly connected to the outer side of the piston plate. The return spring is fixed to the inner wall of the receiving groove. An air supply hole is opened on the inner wall of the fixture and communicates with the receiving groove. A pneumatic telescopic rod is installed on the inner wall of the marking device body. A movable frame is fixedly connected to the telescopic end of the pneumatic telescopic rod. An air supply pipe is fixedly connected to the inner wall of the movable frame and communicates with the air source inside the marking device body. A docking part is provided at one end of the air supply pipe near the fixture.

3. The laser marking device for optical lens processing according to claim 2, characterized in that: The docking component includes a docking frame, which is fixedly connected to a movable frame and communicates with an air supply pipe. A docking plate is fixedly connected to the surface of the clamp and communicates with an air supply hole. Multiple docking holes are opened on the surface of the docking plate. Multiple docking posts are provided on one end of the docking frame near the docking plate. A target plate is fixedly connected to the surface of the docking plate, and a laser rangefinder is installed on the surface of the docking frame.

4. The laser marking apparatus for optical lens processing according to claim 1, characterized in that: The sealing element includes a sealing plug that is slidably connected to the inner wall of the connecting hole, and a compression spring is fixedly connected to the outer side of the sealing plug. The compression spring is fixedly connected to the inner wall of the connecting hole.

5. The laser marking apparatus for optical lens processing according to claim 1, characterized in that: The laser adjustment mechanism includes an electric telescopic rod fixedly connected to the end of the laser. A control box is fixedly connected to the output end of the electric telescopic rod. A reflector 1 and a reflector 2 are installed on the inner wall of the control box. A servo motor 1 is fixedly connected to the outer side of the reflector 1, and a servo motor 2 is fixedly connected to the outer side of the reflector 2. Both servo motor 1 and servo motor 2 are installed on the inner wall of the control box. The output shafts of servo motor 1 and servo motor 2 are perpendicular to each other. A control card is installed on the surface of the laser. The control card is connected to the infrared rangefinder, the electric telescopic rod, servo motor 1, and servo motor 2, respectively.

6. The laser marking apparatus for optical lens processing according to claim 4, characterized in that: The sealing end of the sealing plug is tapered.

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